Concentrator



W. COTTRELL.

coNcENTRATon.* v APPLICATION FILED MAY I8. I9IB- 1,332,863. PatentedMar.2,1920.

2 SHEETS-SHEET 1. I

w. COTTRELL.

CONCENTRATOR.

APPLICATION FILED. MAY I8. |918.

1,332,863. Patented Mar. 2V, 1920.

2 SHEETS-SHEET 2.

Fig .s

oaoo'ooaoooooooooooooo aooooooooaaoeooacoooo'c Ooocrooooooao @lm-Zz'Zlz'a/m @finali WILLIAM COTTRELL, oELos ANGELES, cALIFoRNIA. l

CONCENTRATOR.

Application filed May 1s, 1918. serial No. 235,310.

T0 all wltom t may concern:

Be it lmown that I, WILLIAM COTTREIL, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Concentrators,of which the following is a specificationl' This invention relates to aconcentrator having a table with riflies thereon, and in which eitherair or water may be used as the concentrating agent.

The ultimate object of this invention is to provide a concentratorhaving a high -capacity, a high extraction,Y which is simple andrequires little attention to its operation.

Specific objects of this invention are first, to provide a concentratorof the class described in which the concentrating iluiid-` agentcontinuously maintains the comminuted ore carrying stuff in such stateof separation and suspension that the ore may sink to the bottom, vandthe angue or tailings rise to the top of the ri es; second, to p-rovidea table of such character that the ore travels vsubstantially parallelwith the rifie's, while the tailings have a movement transverse to the'rifliesg third, to provide crowders in the riilles to assist in movingthe tailings transverse to the riiiles so as to increase the capacity ofthe machine; and fourth, to provide means vto carry away the dust whichis created by dry separation.

I accomplish these objects by means of.

the embodiments 'of my invention illustrated in the accompanyingdrawings, 1n whlch:

Figure 1 is a side view in elevatlon of a concentrator arranged to useair as the concentrating agent. Fig. 2 is a vertical section as seen onthe line 2 2 of Fig.` 1. Fig. 2a is a plan view of thel hopper as seenlooking in the direction of the arrows` 2a in Fig. 2. Fig. 3 is an endelevation of the tail end of the table. Fig. 4 is a fragmentary pla-.n4

view of the tail end of the table. Fig. 4a is a section as seen on theline 4-4a of Fig. 4. Fig. 5 is a diagrammatic plan View of the. table.Fig. 6 is an enlarged vertical section through the rifles on the tableasl seen on the line 6-6 of Fig. 5. Fig. 7 is an enlarged fragmentaryplan view of a crowder in position between two ritlies. Fig. 8 is afragmentary plan view of anotherV type of crowder disposed/in a riie.

:Referring particularly toFig. 1, A indicates the foundation frame,which supports the table B. A dust separator is indicated byCommunicatingwith the dust separator is a blower D, which dischargesinto the air chest of the table.

Thetable is supported upon the foundation frame by meansof'leaf springs9, 10

and 11 and is transversely inclined.

Specification of Letters Patent. i 'A Patented Mar. 2, 1920.

construction permits/movement of the table transverse t0 the springs.Secured to the foundation frame is a standard 12 having a block 18mounted upon its top beneath the table. Mounted upon one end of theblock is a buffer cushion 14 disposed to engage a` cross piece 15, whichis securedto the under side of the table.

Fixed to the underside of the table is a bracket 16, throughwhich fpasses a rod 17. The rod is slidably mount-v ed in standard 12, andmounted thereon between its'head and the standard is a compressionspring 18.` The head may be adjusted to vary the spring tension, and thebuffer and cross piece serve to jolt the table.

The table comprisesa casing 19 having a hinged door 2O disposed above alaunder I 21. A riflie board 22 divides the casing into twocompartments, the lower one forming an air chest, and the upper one adust chamber. Communicating with the dust chamber at the upper sidethereof is a hopper 23,-.

through which material is delivered to the riile board. A gate 24controls the feed of material onto the table. 1

Referring particularly to Figs. 5 to 8in-4' cl usive, 25 indicatesriiiies which extend longltudlnally of the riiie board from the head endH to Athe tailend4 T. These riffles are i parallel, and due to the shapeof the board increase in length from the upper side to the lower side.rilie board is closed by a board 26 sothat TheJ .inclined Side of the.

material which reaches the end of the upper riffles will have to traveltransversely toward the tail end thereof. It will be noted thattheriffles extend the full length of the v.

The rile board is preferably formed of one side of each of the channelsare small perforations 27 Upon the opposite side ofv each of thechannels are small perforations 28. In the channels are crowders 29which are preferably formed of sheet metal and are tetrahedronsfordouble vItiwill be noted that one exposed face of each ofthe crowdersinclines upwardly and rearwardly,

-While the 'otherl exposed vface inclines upwardly and forwardly. Itspreferable that the top edge of the crowder' be spaced a short Theriffles' communicate at the tail end arethree spouts shown herein havingthe common'inlet separated by -gates 31.` The` gates are fixed toshafts. 32,'which extend 'through' the.l casingand are bent upwardly toform arms by which they may be turned.

The shafts'j'3'2 are ofspringmetal andthe -ends thereof enage witha'ratchet 33 so thatthey vmay locked in position. A spout 34 isconnected to the end of launder 21. '.The mineral as it leaves the endsof the 'riles discharges into the spout inlet and is separatedinto-dierentclasses, although the` number o f classes ma be varled by"using l moreor less spoits. y shifting Athe gates 31, adjustment may bemade so that any one spout will receive ore from a variable num-A berof' riilies. vThe spout34.

lThe discharge of the blower D is connected by a pipe 35 to the airchest towhich it supplies a1r under pressure. The air then passesthrougl the perforations 27 and 28 1 1n the rile ard, upwardly inclinedcurrents of air from opposite directions meetf ing in the spaces-betweenrillies and creating and'tend to .hold itin suspension as'well-"as dation frame A. pipe 36,l which'discharges into a-'dust'seplstirring it u' However, the air. currents have no ten ency to. blow thematerial off from the table."\The.pipe 35 iiexible tol permit movementofthe table with respect tothe blower which is `fastened to thefounvConnected to the dust chamber a liexible arator C. The dustseparatorC-is mounted be ofany well lm own type, and as'it forms nosvpart of the --inventlon will not be described.. Leading from `the airdischarge v,of

l the dust separator to the inlet ofthe blower i 38.1 lAny dust lwhichis raised on- A lis a vpi the Vil);

table will vbe, sucked through the dust separator, and the clean air-will pass to theinlet of the blower.-v

The table B'v is' vibrated'by means' of an..

eccentric 39 fixedto 'ashaft 40,1and which may bemadeadjustable so thatthe proper "ovelbalance maybe obtained. A ulley 114 isl fixed to shaft40 for rotating t e eccentric. The pulley 41 is rotated by. means of' abelt 42`passing over a pulley on the drivev 4 3.. The springs 9, 10 and'`11 assist tailings discharge air Aeddies,v which agitate the material"in the movement of thetable, the olting oil-' curring. when buffer 14strikes cross piece 15.A

. yAs the table is vibrated, and Lmaterial fed to the upper side ofthehopper the 'material spreads itself thereover, the heavier particlesgravitating to the bottom of the grooves.

The lighter 'material' gradually moves vover the top of the toward thelower side of the table. Some of' the heavy particles na'lly reachthe-'board 26,where itis prevented `from moving further longitudinally,

v and when the riilles s aces become filled with mineral at those Aen s,-it crowdsl Over-and' works itself'transversely .towardjthel spout atthe tail end. The air-which e'ntersthe rilies stirs up the material,tends to hold it in suspensiombut doesl not blow it kolf the table.

Due to the velocity may be maintained, therebyv producfine and closelygrouped aperf tures, a lowair pressure and a low air `streamingamaximumand -"evenly distributed a i'- f tation, and the material isnot blown oi't e table. It' will also be-noted that the apertures aregrouped so as to leave an imperforate space near lthe bottom of thevalleys. This space is a dead s'pace'in. which the. values may collectand remain undisturbed byj the air.- These-features of construction-allincrease the eliiciency of separation.

Thecrowders 29 produce thesame effect as'the board'26 in vforcing thetailings transversely, but permitthe heavy particles to move over thecrowders and continue along the -riles' The board v26 and crowders per#form substantially all the worlr of mo leo the tailings transversely ofthe 'tablef With 'i over the table so thatthere is a'high extraction.v fY I have described the operation of the device as a dryconcentratorn=-However5 lwhile 'this construction separation takes placeall i.

the table isveryv eilective when so used, it y `may be used as -a wetconcentrator. .1n-)such casetheblower B would be replacedjby a thecrowders and-without the water being` supplied through :the rilleboards, that is,

the water may fed upon thel boar-dat the "head end.

riliies opening in tojthe Aspaces therebetween `vso as to dn'ect Huidupwardly thereinto, said apertures being grouped'to end short-of thebottom of the 'spa-ces'between saidrile's so as to forma dead space atthe bottom. .2.- A reciprocablc concentrating table hav# lmg riliesextending longitudinally thereof, v

means inclinin toward the tail end of said table to. crow st ulfftnsversely, closely 110' pump, and therev would be no needl of a dustseparator. The table may also be used with upon 'standards 37, whicharexed to the Y z foundation" frame.. The dust separator-may' s 50grouped line apertures'in said riiiies opening into the spacestherebetween so as to direct opposing currents of Huid from both ingriilies extendingvlongitudinally thereof, means inclining-toward .thetail end of said table to crowd stuff transversely, closely groupedJi-ne apertures in said riliies opening into the spaces therebetween soas to direct opposing currents of f iuid ffrom both y sides of saidspaces upwardly normal to the Y direction-of motion of said table, saidapertures being grouped to end short o'f the bottom of the spacesbetween said riiies so` as to form a dead space.

4. A concentratingv table having riies, crowders in the spaces betweensaid rimes, said crowders having surfaces incliningupwardly toward thetailings end' with respect to the surface of the table.

5. A' concentrating table having riliies, crowdersin the spaces -betweensaidriiles, sa`id-crowders having surfaces arranged diagonal to saidriifles and inclining upwardly toward the tailings end 4with respect tothe surface of theitable. l

6. A lconcentrating table having riifles,

crowders distributed over the surface of the table in the spaces betweensaid riifles, said crowders being tetrahedrons;

7. A concentrating table having riiiies, crowders distributed over thesurface of the table in the spaces between said riiies, said crowdershaving surfaces arranged diagonal to said riflies, apertures in saidriflies opening into the spacesktherebetween-so as to direct fluidthereinto.

8. `A concentrating rtable having riiies,

.crowders `distributed over the surface of the table in the spacesbetween said riiies, said .crowders having surfaces-arranged diagonal tosaid riiiies and inc'lining upwardly toward the tailings end, aperturesin said riiies opening into the spaces therebetween so as to directfluid thereinto. v

I between so as to .direct'iiuid thereinto.

1 0. A. concentrating table having riliies, crowders .distributed overthe :surface --of the table in the spaces between said riies,-.

said crowders having surfaces arranged di'- agonal to said rile's,apertures in said rlffles opening into 4the spaces therebetween vtodirect: opposing currents of uid.

l'11. AA concentpatilngtable having undulating hill and'lvalleyriifles,crowders -in theI spaces between saidrifiies; said crowdershavingsurfaces arranged diagonal t0 said riies and inclining upwardly towardthe tailings end, apertures injthe. inclined sides i having rif-deakofsaid'riiiiesopening in the spaces there-v between so as to directopposing currents to fiuid from both sides of said spaces. 12. Aconcentrating table having rililes,

croyvders in the spaces between said riliies,

.said crowders being .tetrahedron's,' apertures .1n said riiles opening'into the spacesthere between so as to direct opposing currents `of fluidfrom both-sides' of saidspaces.

13. A'l concentrating table having riffles 75 extending longitudinallythereof, said table inclined transversely, crowders in the Spacesbetween said riliies, said -crowders having surfaces. inclining upwardltoward the tail- U table. v v 1 4. A concentrating table having VrifliesI extending longitudially thereof, said table being inclinedtransversely, crowders the ings end with respectto t e surface ofthespaces between said riiiies, said crowders r` having surfaceslarranged diagonal tosaid riiles and inclinmg upwardly toward .the

tailings end.i l

15. A concentrating table vhavin riffles extendinglongitudinallythereof,sald table being inclined, transversely, crowders in the spaces betwensaid rifles, said crowders be,- ing tetrahedrons l x16. A concentratingtable having rifHes extending longitudinally there-of, saidtable beinginclined transversely, crowders 1n thel spaces between saidl riiiles,said crowders having surfaces arranged .diagonal vto'said riiiies,apertures in said riifles opening into the spaces therebetween so as todirect fluid thereint0. X Y

17. concentrating table having riflies extendlng longitudinally thereof,said table being inclined transversely, crowders in the spaces betweensald rliies, said `crowders '105' having surfaces arranged diagonal' to-said riiiies and inclining upwardlyv towardthe tailings end,aperturesin said riii'es?A opening, into the spaces therebetween so asto direct Huid thereinto.

18. A concentrating table having rifle's extending longitudiallythereof,sai d table being inclined transversely, crowders in the spacesbetween said rimes, said crowders vbeing tetrahedrons, aperturesin saidriifles opening into the spaces therebetweenl so as to directiuidthereinto,v

19.A4conce'ntrating table having riiiiesJ lextendin longitudinallythereof, said table being inc ined transversely,`jcrowders in the 120spaces'fbetween `said rimes, said crowders havlng surfaces arrangeddiagonal to said riies, apertures in said riliies opening into thespaces therebetween so as to direct opposing currents of iuid from bothsides of said spaces.

205A concentrating table havin riiies extending longitudinallythereoisald table a being inclined transversely, lcrowders inthe 'spacesbetween said riies, said crowders 130 having surfaces arranged diagonal'to said spaces between said riies, said crowders 10 riiHes and'inclining upwardly 'toward the being tetrahedrons, aperturesin saidriies.

tailings' end, apert'ures'in said ries openopening into the spacestherebetween so as ing into the spaces therebetween so as to to directopposing currents of Huid from- `5 direct opposing currents of Huid fromboth v both sides of said spaces.

sides of said spaces. In witness that I- claim the foregoing I 15 21. A'concentrating table having .riiles have hereunto subscribed mydnarnevthis 10th extending longitudinally thereof, said table day of May, 1918.being inclined transversely, crowders in the v n' VILLIAM COTTRELL.

